| The age of major monocot groups inferred from 800+rbcL sequences T Janssen, K Bremer Botanical Journal of the Linnean Society 146 (4), 385-398, 2004 | 395 | 2004 |
| Neoendemism in Madagascan scaly tree ferns results from recent, coincident diversification bursts T Janssen, N Bystriakova, F Rakotondrainibe, D Coomes, JN Labat, ... Evolution: International Journal of Organic Evolution 62 (8), 1876-1889, 2008 | 106 | 2008 |
| Exploring the evolution of humus collecting leaves in drynarioid ferns (Polypodiaceae, Polypodiidae) based on phylogenetic evidence T Janssen, H Schneider Plant Systematics and Evolution 252 (3-4), 175-197, 2005 | 85 | 2005 |
| New insights into the phylogeny of Pleopeltis and related Neotropical genera (Polypodiaceae, Polypodiopsida) EM Otto, T Janßen, HP Kreier, H Schneider Molecular Phylogenetics and Evolution 53 (1), 190-201, 2009 | 69 | 2009 |
| Climate and the distribution of grasses in West Africa G Bocksberger, J Schnitzler, C Chatelain, P Daget, T Janssen, M Schmidt, ... Journal of Vegetation Science 27 (2), 306-317, 2016 | 51 | 2016 |
| Origin and diversification of African ferns with special emphasis on Polypodiaceae T Janssen, HP Kreier, H Schneider Brittonia 59 (2), 159-181, 2007 | 50 | 2007 |
| Gondwanan origin of major monocot groups inferred from dispersal-vicariance analysis K Bremer, T Janssen Aliso: A Journal of Systematic and Evolutionary Botany 22 (1), 22-27, 2006 | 49 | 2006 |
| Phylogenetic Relationships of the Enigmatic Malesian Fern Thylacopteris (Polypodiaceae, Polypodiidae) H Schneider, T Janssen, P Hovenkamp, AR Smith, R Cranfill, CH Haufler, ... International Journal of Plant Sciences 165 (6), 1077-1087, 2004 | 41 | 2004 |
| The West African Vegetation Database M Schmidt, T Janßen, S Dressler, K Hahn, M Hien, S Konaté, AM Lykke, ... Biodivers Ecol 4, 105-110, 2012 | 31 | 2012 |
| Key innovations versus key opportunities: identifying causes of rapid radiations in derived ferns H Schneider, HP Kreier, T Janssen, E Otto, H Muth, J Heinrichs Evolution in action, 61-75, 2010 | 29 | 2010 |
| Phylogenetic relationships of the fern genus Christiopteris shed new light onto the classification and biogeography of drynarioid ferns H Schneider, HP Kreier, P Hovenkamp, T Janssen Botanical Journal of the Linnean Society 157 (4), 645-656, 2008 | 24 | 2008 |
| Addressing data property rights concerns and providing incentives for collaborative data pooling: the West African Vegetation Database approach T Janßen, M Schmidt, S Dressler, K Hahn, M Hien, S Konaté, AM Lykke, ... Journal of Vegetation Science 22 (4), 614-620, 2011 | 23 | 2011 |
| A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles T Janssen, F Rakotondrainibe Adansonia 30 (2), 221-376, 2008 | 23 | 2008 |
| A complete digitization of German herbaria is possible, sensible and should be started now T Borsch, AD Stevens, E Häffner, A Güntsch, WG Berendsohn, ... Research Ideas and Outcomes 6, e50675, 2020 | 22 | 2020 |
| Plant diversity, functional traits and soil conditions of grass savannas on lateritic crusts (bowé) in south eastern Burkina Faso A Zwarg, M Schmidt, T Janßen, K Hahn, G Zizka Flora et Vegetatio Sudano-Sambesica 15, 15-24, 2012 | 20 | 2012 |
| Conservation priorities for tree ferns (Cyatheaceae) in Sri Lanka RHG Ranil, D Pushpakumara, T Janssen, CR Fraser-Jenkins, ... Taiwania 56 (3), 201-209, 2011 | 18 | 2011 |
| Diversité des Fougères et leurs alliées le long du gradient altitudinal au sein de l’écosystème forestier des montagnes du Parc National de Kahuzi-Biega (RD Congo) JD Mangambu Mokoso, F Muhashy Habiyaremye, T Janssen, ... International Journal of Environmental Studies 70 (2), 259-283, 2013 | 16 | 2013 |
| An update of the revision of Cyathea subgen. Alsophila sect. Gymnosphaera (Cyatheaceae) in Madagascar and the Comoros including a discussion of putative hybridization events T Janssen, F Rakotondrainibe Adansonia 29 (2), 195-213, 2007 | 14 | 2007 |
| Cyathea srilankensis Ranil (Cyatheaceae): A new tree fern species from Sri Lanka RHG Ranil, D Pushpakumara, T Janssen, DSA Wijesundara, ... American Fern Journal 100 (1), 39-44, 2010 | 12 | 2010 |
| Cyathea sledgei (Cyatheaceae): a new species of tree-fern from Sri Lanka RHG Ranil, D Pushpakumara, T Janssen, CR Fraser-Jenkins, ... Fern Gazette 18 (7), 320, 2010 | 8 | 2010 |
